It stands for Intel (Itanium) Architechture (64 bit)

Itaniums were 64 bit before 64 bit pentiums came along. People dont call it IA64 much more anymore because IA64 (meaning Itanium) is totally different from regular IA32 (x86) code and its 64 bit superset - x86_64, and the names could get confused.

IA64 refers to the Intel IA64 processor/arch line (also called "Tiger"). They use EFI and not BIOS.

A 64-bit Xeon is actually of the x86 arch and not ia64. Other terms for 64-bit x86 archs: x86_64, EM64T (Intel)

Link to Intel's Itanium page: http://www.intel.com/products/proces...nium/index.htm

Yep.